itchy palm

1) Someone who is greedy or has an insatiable desire for money.

2) Looking for a bribe or payoff.

That club’s door guy had an itchy palm. He didn’t want to let us in without coughing up a little extra somethin for him.

Origin: In Shakespeare’s “Julius Caesar,” Brutus says, “Let me tell you, Cassius, you yourself are much condemned to have an itching palm.”